brad@saturn.ucsc.edu (Brad Smith) (10/27/87)
Does anyone know how to get NCSA Telnet to access a subnet of a class B net (i.e. subnet mask 255.255.255.0)? I have tried all kinds of values in the "Use Subnetting Mask" box of NCSA Telnet version 2.0 (a great piece of software at the perfect price!), including "ffffff00", "ff.ff.ff.0", "0xff.0xff.0xff.0", all of the previous with "F"s, and 255.255.255.0. All cases seem to have no effect; from what I can see (with tcpdump on a Sun) it looks like the Kbox catches the packet, makes its own decision as to whether it is going to a different network (which doesn't detect subnets) and arps for the host on the attached Ethernet (which the host isn't attached to). The Kbox is running release # 5 of the KIP code (I assume... the srec file I load to it is "at-gw.srec.5"). Any help will be greatly appreciated, Brad Smith System Administrator CIS Board, UC Santa Cruz brad@saturn.ucsc.edu
hpoppe@scdpyr.UUCP (Herb Poppe) (10/28/87)
In article <1032@saturn.ucsc.edu>, brad@saturn.ucsc.edu (Brad Smith) writes: > Does anyone know how to get NCSA Telnet to access a subnet of > a class B net (i.e. subnet mask 255.255.255.0)? ... Try the hex value "08" (zero-eight). I guess this means "eight bits on". Not my idea of a mask either. It took me awhile to stumble on this one! The documentation needs to be more explicit on the appropriate value to enter for this parameter. Are you listening, Gaige? -- Herb Poppe NCAR INTERNET: hpoppe@scdpyr.UCAR.EDU (303) 497-1296 P.O. Box 3000 CSNET: hpoppe@ncar.CSNET Boulder, CO 80307 UUCP: hpoppe@scdpyr.UUCP
rick@sbcs.UUCP (10/30/87)
While we're on the subject, does anyone know if the sources for NCSA telnet are available? Rick Spanbauer SUNY/Stony Brook
gaige@ncsa.uiuc.EDU.UUCP (10/30/87)
The current format for NCSA Telnet subnet masks is eight hexidecimal digits indicating an actual bit mask for the IP number. The most common example, for a class B net with eight bits of subnetting is "ffffff00", which happens to be the same as class A, sixteen bits of subnet. Similarly, class A with eight bits is "ffff0000." It is important to note that if the kinetics box stradles subnets (has one IP net number on the ethernet side and a different one on the AppleTalk side), the AppleTalk side of the Kinetics box must be specified as a gateway in the config.tel file. An example of this is a KBox running the combined gateway from kinetics with 128.174.20.1 Ethernet and 128.174.22.1 AppleTalk. Assuming a class B, eight bit subnet, the subnet mask would be "ffffff00" and the following entry should be in the config.tel: name=Kbox hostip=128.174.22.1 gateway=1 I hope this helps, Gaige B. Paulsen National Center for Supercomputing Applications University of Illinois gaige@ncsa.uiuc.edu